This always makes me think. Cockroaches don’t bite, are not venomous, basically can’t do us any harm. I’m not afraid of wild dogs, spiders, tarantulas, scorpions, snakes, wolves, hyenas, wild hogs, bears (encountered them all) but I might actually scream if I get surprised by a cockroach.
I think this collective fear of cockroaches that we have cannot be without reason and must have an evolutionary reason.
I think you’re assuming that everyone has the same reactions as you do, but that’s not true at all. I’ve never lived in a place with a heavy cockroach infestation but I’ve seen a few and they don’t have that effect on me at all. I logically know they’re a pest and gross, but I don’t have any physical or emotional reaction to them at all. I feel like your fear is a learned response.